Personal Security Door Alarm Bell

【Receive Real-Time Alerts Remotely】- When a door/window is opened or closed, the sensor will immediately push an instant notification to your smartphone. This way you don't have to worry about your baby going out without notification will easily know when your aging parents are leaving or arriving home, and can even see at a glance when someone enters your home, store, office, etc. Also, make sure there are no obstructions between the door magnet and the wifi. Otherwise, the connection will easily stop 【Compatible With Google Play, Andriod, And Ios Systems】- no hub required, no charge. Convenient for detecting doors, windows, cabinets, drawers, or any location you want to be notified when it is open or closed. Make your travel, work, shopping, or shopping hassle-free 【Alarm Message Push】- Protect your home with door open/close detection. When a door/window is triggered, you will receive an alert signal from your phone. Home security alerts make the house safer 【Easy Installati